sPHENIX discussion of the superconducting solenoid

["Yip, Kin" <kinyip AT bnl.gov>]

Hi,

Pablo Rosas' test has just completed.  ( We opened the contactors of dump resistor in 1008 so that we could go home 30+ minutes earlier. )   Today, Pablo didn't really work on "compensation" or change regulation.  He and his team have taken a lot 

of data for currents/voltages for the Power Supply and the Regulator, using his precise meter and a different logger, not found

in the data kept in LogView (which are routed through our quench-detector data chain and the PSI-ramp-control data chain).

Pablo cares more about the Power Supply information than most of us.

I've just informed the Cryo Control Room (and  I discussed with Roberto about the timing a few hours ago).  So, Cryo will shut the valve in 1008 to stop He supply from the RHIC ring and boil off the remaining He in 1008.  As a result, tomorrow Adrian Steinhauff can take off the ODH sign for 1008 --- we have discussed a couple times about this.    ( Roberto told me that for warming half of the RHIC ring, they'll do it up tomorrow as it requires 3 of them with a bit more works. )

Ron Walker is the one who has been baby-sitting the Power Supply in 1008B for the last several hours and he's also the on-duty CAS member tomorrow morning (from 5:30 am onwards).  He'll help Frank Toldo do the LOTO's to open the pole-tip doors tomorrow morning.

Kin